Index: libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_size_align.fail.cpp
===================================================================
--- libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_size_align.fail.cpp
+++ libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_size_align.fail.cpp
@@ -14,6 +14,12 @@
 
 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
 // UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8
+// XFAIL: with_system_cxx_lib=macosx10.12
+// XFAIL: with_system_cxx_lib=macosx10.11
+// XFAIL: with_system_cxx_lib=macosx10.10
+// XFAIL: with_system_cxx_lib=macosx10.9
+// XFAIL: with_system_cxx_lib=macosx10.8
+// XFAIL: with_system_cxx_lib=macosx10.7
 
 #include <new>
 
Index: libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_size_align_nothrow.fail.cpp
===================================================================
--- libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_size_align_nothrow.fail.cpp
+++ libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_size_align_nothrow.fail.cpp
@@ -14,6 +14,12 @@
 
 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
 // UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8
+// XFAIL: with_system_cxx_lib=macosx10.12
+// XFAIL: with_system_cxx_lib=macosx10.11
+// XFAIL: with_system_cxx_lib=macosx10.10
+// XFAIL: with_system_cxx_lib=macosx10.9
+// XFAIL: with_system_cxx_lib=macosx10.8
+// XFAIL: with_system_cxx_lib=macosx10.7
 
 #include <new>
 
Index: libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new_size_align.fail.cpp
===================================================================
--- libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new_size_align.fail.cpp
+++ libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new_size_align.fail.cpp
@@ -14,6 +14,12 @@
 
 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
 // UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8
+// XFAIL: with_system_cxx_lib=macosx10.12
+// XFAIL: with_system_cxx_lib=macosx10.11
+// XFAIL: with_system_cxx_lib=macosx10.10
+// XFAIL: with_system_cxx_lib=macosx10.9
+// XFAIL: with_system_cxx_lib=macosx10.8
+// XFAIL: with_system_cxx_lib=macosx10.7
 
 #include <new>
 
Index: libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new_size_align_nothrow.fail.cpp
===================================================================
--- libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new_size_align_nothrow.fail.cpp
+++ libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/new_size_align_nothrow.fail.cpp
@@ -14,6 +14,12 @@
 
 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
 // UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8
+// XFAIL: with_system_cxx_lib=macosx10.12
+// XFAIL: with_system_cxx_lib=macosx10.11
+// XFAIL: with_system_cxx_lib=macosx10.10
+// XFAIL: with_system_cxx_lib=macosx10.9
+// XFAIL: with_system_cxx_lib=macosx10.8
+// XFAIL: with_system_cxx_lib=macosx10.7
 
 #include <new>